Hydrogen storage tank with leak management functionality
a technology of hydrogen storage tank and leak management, applied in the direction of transportation and packaging, electrochemical generators, container discharging methods, etc., can solve the problems of gaseous hydrogen storage in a storage tank, explosion risk, metal parts degradation, etc., and achieve the effect of avoiding potential explosion and/or embrittlement of metal parts
Pending Publication Date: 2022-07-21
ROLLS ROYCE PLC
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Benefits of technology
The patent describes a tank for storing and collecting hydrogen gas that may be leaked from the tank. The tank has a composite layer with a hydrogen-porous layer on the outside and a non-porous layer on the inside. This prevents the gas from exploding or damaging metal parts. The tank also has impact-protecting ribs on the outside, which provide additional protection against damage. These ribs can be formed part of the non-porous layer or applied separately. This design allows for safe and efficient use of hydrogen gas.
Problems solved by technology
However, storage of gaseous hydrogen in a storage tank presents several technical challenges, one of which is the management of hydrogen which leaks from the tank.
Loss of hydrogen by leakage wastes fuel, presents an explosion risk, particularly where a tank is located in a enclosed area, and may also lead to degradation of metallic parts by embrittlement.
Method used
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[0017]Referring to FIGS. 1 and 2, a first example hydrogen storage tank 100 has a generally cylindrical body with hemispherical domed ends, one domed end having main fuel port 106 allowing an internal storage volume 120 of the tank 100 to be filled with gaseous hydrogen and discharged. The tank 100 has a central longitudinal axis 102. The wall 115 of the tank 100 comprises a polymer liner 112, a composite laminate wall 114, a hydrogen-porous layer 110 in contact with the outer surface of the composite laminate wall 114 and a hydrogen-non-porous layer 104 in contact with the outer surface of the hydrogen-porous layer 110. The hydrogen-non-porous layer 104 allows hydrogen which leaks from the internal storage volume 120 through the liner 112, composite laminate wall 114 and hydrogen-porous layer 110 to be captured and removed via an output port 108 in the hydrogen-non-porous layer 104. A conduit 109 couples to the output port 108 to the exterior of the tank 100.
[0018]The conduit 109 m...
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Abstract
A hydrogen storage tank has a composite laminate wall, a hydrogen-porous layer in contact with the outer surface of the composite laminate wall and a hydrogen-non-porous layer in contact with the outer surface of the hydrogen-porous layer, the hydrogen-non-porous layer having an output port for venting hydrogen which passes through the composite laminate wall and the hydrogen-porous layer from the interior of the tank. The tank allows hydrogen which leaks through the composite laminate wall to be collected and re-used. The invention also allows for the rate of hydrogen leakage from the tank to be measured, providing a measure of the structural integrity of the tank.
Description
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS[0001]This application is based upon and claims the benefit of priority from British Patent Application No. GB 2100662.2, filed on Jan. 19, 2021, the entire contents of which are herein incorporated by reference.BACKGROUNDTechnical Field[0002]The present disclosure relates to storage of gaseous hydrogen, particularly for use in transport applications, including aeronautical applications.Description of Related Art[0003]The use of gaseous hydrogen as a fuel is of increasing interest in transport applications, including aeronautical applications, due an absence of CO2 generation at the point of use. However, storage of gaseous hydrogen in a storage tank presents several technical challenges, one of which is the management of hydrogen which leaks from the tank. Leakage of gaseous hydrogen from hydrogen storage tanks is common, due to the very small size of the hydrogen molecule (120 pm). Loss of hydrogen by leakage wastes fuel, presents an e...
Claims
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IPC IPC(8): F17C1/16F17C13/02H01M8/04089H01M8/04746H01M8/04111
CPCF17C1/16H01M2250/20H01M8/04089H01M8/04753H01M8/04111F17C2221/012F17C2203/066F17C2201/0109F17C2203/012F17C2250/0443F17C2270/0184F17C2227/0157F17C2270/0189F17C2203/0624F17C2203/0663F17C2260/042F17C13/02F17C1/04F17C2201/054F17C2201/056F17C2203/0604F17C2203/0607F17C2203/0621F17C2223/0123F17C2223/036F17C2270/0178F17C2260/036F17C2260/038
Inventor BUTLER, PHILIP D.DEAN, ERIC W.PALMER, CHLOE J.
Owner ROLLS ROYCE PLC